膜
材料科学
聚偏氟乙烯
肿胀 的
化学工程
聚合物
无定形固体
多孔性
层状结构
甲基丙烯酸酯
乙二醇
高分子化学
作者
Shuyun Zheng,Xiaolong Lu,Chunrui Wu,Sihua Liu,Juanjuan Liu,Guiming Shu,Ke Li
标识
DOI:10.1016/j.seppur.2022.121090
摘要
• The pore channel was successfully reconstructed by the confined-region swelling. • The high-flux membrane with excellent hydrophilicity and mechanical strength was achieved. • The high-flux membrane has small pore size and narrow pore size distribution. Herein, a novel strategy to reconstruct the pore channels of crystalline polymer porous membrane is reported. The method is based on the property that molecular chains in amorphous regions of the crystalline polymer are in the high elasticity form, and the swelling of amphiphilic macromolecules used to reconstruct the pore channel in the amorphous region of membrane. The hydrophilic polyvinylidene fluoride (PVDF)/PVDF-graft-poly (ethylene glycol) methyl ether methacrylate (PVDF-g-PEGMA) blended membrane was prepared. Then the reconstruction of membrane pore channel is based on that the PVDF chains in the amorphous regions are in the high elasticity form and the swelling property of PEGMA chains. After the reconstruction of membrane pore channel, the pore size decreased from 164.2 to 73.5 nm and the membrane flux increased from 670 to 1298 L·m −2 ·h −1 . This strategy of membrane pore channel reconstruction can not only improve the membrane hydrophilicity and flux, but also avoid the adverse influence accompanied by conventional methods on the pore size and mechanical strength, which is an innovative and effective method to prepare the antifouling and high-flux porous membrane.
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